光伏离网发电储能控制策略的研究.pdf

光伏离网发电储能控制策略的研究 摘 要 近年来由于全球能源的逐渐紧张和环境污染的日益严重，清洁的可再生的 太阳能源越来越受到人们的重视，同时太阳能的光电转换技术也不断发展至可 大规模应用的水平。在未来，太阳能电池的应用有着良好的发展前景。从太阳 能电池的光伏特性出发，来研究如何提高太阳能的转换效率无疑是很有现实意 义的。 光伏阵列输出特性是光伏发电系统研究中的最基本问题。本文在光伏阵列 输出特性方程的基础上，运用 Matlab/Simulink 建立光伏阵列和基于 BUCK 电 路的 MPPT 仿真模型，为实现系统仿真、指导理论研究和系统设计提供了基础 保证。最大功率点跟踪（MPPT ）方法是光伏发电系统中提高系统效率的重要 手段。本文首先介绍了光伏阵列的输出特性及最大功率点跟踪的方法和原理并 介绍常见的 MPPT 方法。其次建立了以 BUCK 电路为核心实现离网光伏发电系 统 MPPT 的仿真模型，并对此运用 Matlab/Simulink 进行仿真。最后在分析光伏 离网发电系统工况的基础上，基于单片机进行了太阳能充放电控制器的设计。 关键词：光伏阵列，最大功率点跟踪，Matlab/Simulink ，仿真，单片机 Research on control method of energy storage based on Stand-alone PV Generation Abstract Nowadyas,with the increasing burden on energy exhaustion and environment pollution ，as a cleanly and renewable energy,solar energy has became a hotspot of the whole world.At the same time,the technique of the PV(Photovoltaic) conversion has come into the applied level on a large scale.In the future,the application of the PV will has a exciting status.It is significant to research on improving the conversion efficiency of PV from its Volt-Ampere Characteristics. The output characteristics of PV arrays is the base of research on PV systems. This thesis presents simulation model of PV arrays based on the output characteristics formulas.It can be directly applied in circuit simulation and system analysis.Maximum Power Point Tracking(MPPT) method is an important means to improve the system efficiency of PV power generation system.Firstly,MPPT theory and various MPPT methods are introduced in the literature.Secondly,this article analyzes the principle of BUCK circuit applications.The simulation study of BUCK circuit applied in the MPPT is completed based on Matlab/ Simu